Keep It Simple

Use metrics that are easy to compile and update. Complex calculations or metrics
that require excessive work do not get updated or people fake the data.

Use Tripwires

Simple metrics may not reveal the problem source. This is OK. The daily or
weekly metric only needs to alert you that a problem exists.

Limit The Metrics

Each person or team should have 3-6 daily or weekly metrics. More than this and
the metrics do not get monitored. These metrics do not have to contain all the information that
the person or group will ever need; they should just signal an alert.

Drill Down When Problems Arise

When a "tripwire" metric indicates a deviation, you can investigate further to
find the source of the problem. This may require additional data that is not continually
gathered, processed and analyzed.